/*
 * Copyright (C) 2010 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.google.greaze.definition.internal.utils;

public final class GreazePreconditions {

  public static void checkArgument(boolean condition) {
    if (!condition) {
      throw new IllegalArgumentException();
    }
  }

  public static void checkArgument(boolean condition, String msg) {
    if (!condition) {
      throw new IllegalArgumentException(msg);
    }
  }

  public static void checkNull(Object obj) {
    if (obj != null) {
      throw new IllegalArgumentException();
    }
  }

  public static void checkNotNull(Object obj) {
    if (obj == null) {
      throw new IllegalArgumentException();
    }
  }

  public static void checkNotNull(Object obj, String msg) {
    if (obj == null) {
      throw new IllegalArgumentException(msg);
    }
  }
}
